We tow our dear Lucy who is a 25FB weighing 7400# with a 3/4 ton Suburban. At one time we towed her with our 2004 Tahoe (5.3 liter V-8/3.73 rear). It did OK, but not great. Your half ton Chevy pick-up should do as well. The 23FB should be fine. The 25FB will work, but may be lacking on tough upgrades.
SuEllyn & Brian McCabe
WBCCI #3628 -- AIR #14872 -- TAC #FL-7
2015 FC 25' FB (Lucy) with HAHA
2005 Suburban 2500 Quadrasteer (Olivia) & 2011 Silverado 3500 (Fred) with Outfitter Truck Camper (Ethel)